Four cards with special adventurers: - Keysmith allows you to place any 1 key at the bottom of either altar and then draw top card - Sculptor allows you to discard at the end of your turn any number of blocks and to draw new ones - Architect allows you, once per turn, after placing one block, to discard 1 block to place another - Curators allows you, after placing a block, to draw one from any excavation sites closest to you